Extreme Heat Warning — Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL 7:00 PM Heat Advisory — Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL 7:00 PM

Marshall County, Illinois, United States

Last updated: 1:55 AM CDT  ·  Refresh
26°C
Feels like 27°
Clear
▲ 34°  /  ▼ 24°
Wind
6 mph SSW
Humidity
72%
Dew Point
21°
Pressure
29.23 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
1%
Sunrise
6:25 AM
Sunset
7:26 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Marshall County is currently clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2993 J/kg) — isolated convective development possible. Sunrise: 6:25AM · Sunset: 7:26PM.

Alerts

Extreme Heat Warning
Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL
Expires 7:00 PM
Heat Advisory
Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL
Expires 7:00 PM
59 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
10%
2 AM
26°
10%
3 AM
25°
4%
4 AM
24°
4%
5 AM
23°
4%
6 AM
23°
4%
7 AM
25°
9%
8 AM
27°
17%
9 AM
29°
17%
10 AM
30°
17%
11 AM
31°
18%
12 PM
32°
18%
1 PM
34°
18%
2 PM
34°
19%
3 PM
34°
19%
4 PM
33°
17%
5 PM
34°
8%
6 PM
33°
3%
7 PM
32°
3%
8 PM
31°
9%
9 PM
28°
9%
10 PM
28°
11%
11 PM
27°
12%
12 AM
27°
12%
7-Day Forecast
Today
34° 24°
Clear.
Fri
35° 24°
Mostly Clear.
Sat
34° 21°
Clear with a 36% chance of rain.
Sun
27° 17°
Overcast with a 24% chance of rain.
Mon
29° 16°
Clear.
Tue
32° 18°
Drizzle, 52% chance.
Wed
35° 21°
Clear with a 52% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 26° Clear 10% 6 mph SSW 72%
2 AM 26° Clear 10% 8 mph SSW 67%
3 AM 25° Clear 4% 8 mph SSW 69%
4 AM 24° Clear 4% 8 mph SSW 72%
5 AM 23° Clear 4% 7 mph SSW 75%
6 AM 23° Clear 4% 7 mph SSW 78%
7 AM 25° Clear 9% 8 mph SSW 75%
8 AM 27° Clear 17% 10 mph SW 70%
9 AM 29° Clear 17% 10 mph SW 65%
10 AM 30° Clear 17% 9 mph SW 63%
11 AM 31° Clear 18% 9 mph SW 59%
12 PM 32° Clear 18% 9 mph SW 56%
1 PM 34° Clear 18% 8 mph SW 55%
2 PM 34° Mostly Clear 19% 7 mph SW 54%
3 PM 34° Mostly Clear 19% 7 mph SW 54%
4 PM 33° Mostly Clear 17% 6 mph SW 58%
5 PM 34° Clear 8% 5 mph SSW 63%
6 PM 33° Clear 3% 5 mph S 69%
7 PM 32° Clear 3% 6 mph S 71%
8 PM 31° Clear 9% 6 mph S 72%
9 PM 28° Clear 9% 6 mph S 72%
10 PM 28° Clear 11% 6 mph S 72%
11 PM 27° Clear 12% 7 mph S 71%
12 AM 27° Clear 12% 7 mph S 71%
15-Day Forecast
Today
9/3
Clear
18%
24°
34°
Fri
9/4
Mostly Clear
15%
24°
35°
Sat
9/5
Clear
36%
21°
34°
Sun
9/6
Overcast
24%
17°
27°
Mon
9/7
Clear
16%
16°
29°
Tue
9/8
Drizzle
52%
18°
32°
Wed
9/9
Clear
52%
21°
35°
Thu
9/10
Drizzle
43%
19°
33°
Fri
9/11
Drizzle
44%
19°
34°
Sat
9/12
Drizzle
51%
19°
34°
Sun
9/13
Drizzle
60%
19°
29°
Mon
9/14
Drizzle
60%
18°
29°
Tue
9/15
Drizzle
60%
17°
28°
Wed
9/16
Drizzle
60%
16°
27°
Thu
9/17
Drizzle
60%
16°
26°
59
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
59 AQI 13.4 µg/m³
O3
Ground-level ozone
39 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 59 Moderate 39 59
Fri 48 Good 37 48
Sat 44 Good 41 44
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Thu Sep 3, 05:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE604 J/kg
MLCAPE190 J/kg
MUCAPE604 J/kg
SBCIN-415 J/kg
MLCIN-239 J/kg
Lifted Index-2.0
Kinematics
0–6 km Shear24 kt
0–1 km Shear15 kt
Eff. Shear22 kt
0–1 km SRH102
0–3 km SRH86
Eff. SRH39
Storm Motion318° @ 17 kt
0–1 km EHI0.4
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.3
K-Index26.2
Thermo & Levels
PWAT1.29 in
0–3 km LR5.3 °C/km
700–500 LR5.8 °C/km
Total Totals44.5
LCL928 hPa
LFC698 hPa
EL237 hPa
Freezing Lvl15,433 ft